default sort strategy is a duplicate of kernel scheduling

Bug #587503 reported by Jérôme
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
preload (Ubuntu)
Invalid
Undecided
Unassigned
Nominated for Lucid by Jérôme
Nominated for Maverick by Jérôme

Bug Description

Binary package hint: preload

By default preload is sorting the files to be read ahead by using a sort strategy which uses the blocks order.

However, this strategy is I/O intensive and this adds an duplicate sort to the kernel I/O requests ordering.

Even if we can configure an other strategy into the /etc/preload.conf file, I think that preload should give the hand to the linux kernel by default for the I/O scheduling.

I think that the below parameters would achieve a better performance :
- parallel I/O requests (by default)
- kernel I/O scheduling (by default "--iosched idle" in /etc/default/preload)
- no sort (not by default)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: preload 0.6.4-1
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Sun May 30 14:24:23 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 LANG=fr_FR.utf8
 SHELL=/bin/bash
SourcePackage: preload

Revision history for this message
Jérôme (jerome-bouat) wrote :
summary: - default sortstrategy is a duplicate of kernel scheduling
+ default sort strategy is a duplicate of kernel scheduling
Revision history for this message
dino99 (9d9) wrote :

Closing that outdated report as EOL has been reached long time ago

Changed in preload (Ubuntu):
status: New → Invalid
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